A motor skill that changes with each trial is said to have what characteristic?

A motor skill that changes with each trial is said to have what characteristic?

• A. Consistency
• B. Serial dependency
• C. Learning effect
• D. Intertrial variability

Answer: (D)

Intertrial variability is the degree to which motor performance changes from one attempt to the next. In many skills, even with the same task and conditions, small differences in planning, execution, or sensory feedback cause outcomes to vary across trials. That makes the behavior characteristic of intertrial variability—the performance isn’t fixed, it shifts from trial to trial. Consistent performance would imply little or no variation across trials, which is the opposite. A learning effect describes a systematic change over many trials, typically improvement, rather than trial-to-trial fluctuations. Serial dependency refers to one trial being influenced by the previous trial in a way that creates a pattern, which is a more specific relationship than the general notion of changing from trial to trial.

Intertrial variability is the degree to which motor performance changes from one attempt to the next. In many skills, even with the same task and conditions, small differences in planning, execution, or sensory feedback cause outcomes to vary across trials. That makes the behavior characteristic of intertrial variability—the performance isn’t fixed, it shifts from trial to trial.

Consistent performance would imply little or no variation across trials, which is the opposite. A learning effect describes a systematic change over many trials, typically improvement, rather than trial-to-trial fluctuations. Serial dependency refers to one trial being influenced by the previous trial in a way that creates a pattern, which is a more specific relationship than the general notion of changing from trial to trial.